SEOUL -- A relative of former South Korean President Roh Moo-Hyun was detained by prosecutors, admitting he received money from a businessman indicted for bribery.

Officials from the Supreme Prosecutors' Office raided the home of Yeon Chul-ho, who said the million he received from Park Yeon-cha -- indicted on charges of tax evasion and bribery -- was a legitimate investment in a start-up business, the South Korean news agency Yonhap reported Friday.

The government's investigation into Park shifted to the Roh family after the former president said on his Web site that his wife accepted money from Park to repay debts.

In a statement, Roh said he learned of the deal between Park and Yeon, the son-in-law of Roh's older brother, after leaving office but did not investigate, the news agency said.

Prosecutors were also expected to question Roh Gun-ho, the former president's son, who reportedly accompanied Yeon to a meeting with Park.

The former first couple also is expected to be questioned, prosecutors said.